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prezto/modules/git/functions/git-submodule-move

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#
# Moves a Git submodule.
#
# Authors:
# Sorin Ionescu <sorin.ionescu@gmail.com>
#
if ! is-true "$(git rev-parse --is-inside-work-tree 2> /dev/null)"; then
print "$0: not a repository work tree: $PWD" >&2
return 1
elif [[ "$PWD" != "$(git-root)" ]]; then
print "$0: must be run from the root of the work tree" >&2
return 1
fi
local src="$1"
local dst="$2"
local url
url="$(git config --file "$(git-root)/.gitmodules" --get "submodule.${src}.url")"
if [[ -z "$url" ]]; then
print "$0: submodule not found: $src" >&2
return 1
fi
mkdir -p "${dst:h}"
git-submodule-remove "$src"
git submodule add "$url" "$dst"
return 0